Publications by Bénédicte Demaurex

Field-effect passivation on silicon nanowire solar cells (vol 8, pg 673, 2015)

Bénédicte Demaurex, Anna Fontcuberta i Morral, Stefaan De Wolf, Anna Dalmau Mallorquí, Amirreza Kiani

Surface recombination represents a handicap for high-efficiency solar cells. Surface recombination represents a handicap for high-efficiency solar cells. This is especially important for nanowire array solar cells, where the surface-to-volume ratio is grea ...

Tsinghua Univ Press2016

Practical silicon deposition rules derived from silane monitoring during plasma-enhanced chemical vapor deposition

Christophe Ballif, Bénédicte Demaurex, Stefaan De Wolf

We clarify the difference between the SiH4 consumption efficiency eta and the SiH4 depletion fraction D, as measured in the pumping line and the actual reactor of an industrial plasma-enhanced chemical vapor deposition system. In the absence of significant ...

American Institute of Physics2015

Amorphous/Crystalline Silicon Interface Passivation: Ambient-Temperature Dependence and Implications for Solar Cell Performance

Christophe Ballif, Bénédicte Demaurex, Stefaan De Wolf, Johannes Peter Seif

Silicon heterojunction (SHJ) solar cells feature amorphous silicon passivation films, which enable very high voltages. We report how such passivation increases with operating temperature for amorphous silicon stacks involving doped layers and decreases for ...

Ieee-Inst Electrical Electronics Engineers Inc2015

Field-effect passivation on silicon nanowire solar cells

Bénédicte Demaurex, Anna Fontcuberta i Morral, Stefaan De Wolf, Anna Dalmau Mallorquí, Amirreza Kiani, Esther Alarcon Llado

Surface recombination represents a handicap for high-efficiency solar cells. This is especially important for nanowire array solar cells, where the surface-to-volume ratio is greatly enhanced. Here, the effect of different passivation materials on the effe ...

Tsinghua Univ Press2015

Amorphous silicon enhanced metal-insulator-semiconductor contacts for silicon solar cells

Aïcha Hessler-Wyser, Bénédicte Demaurex, Stefaan De Wolf

Carrier recombination at the metal-semiconductor contacts has become a significant obstacle to the further advancement of high-efficiency diffused-junction silicon solar cells. This paper provides the proof-of-concept of a procedure to reduce contact recom ...

American Institute of Physics2014

Low-temperature plasma-deposited silicon epitaxial films: Growth and properties

Christophe Ballif, Bénédicte Demaurex, Quentin Thomas Jeangros, Duncan Thomas Lindsay Alexander, Stefaan De Wolf, Johannes Peter Seif

Low-temperature (

American Institute of Physics2014

Amorphous silicon passivated contacts for diffused junction silicon solar cells

Aïcha Hessler-Wyser, Bénédicte Demaurex, Stefaan De Wolf

Carrier recombination at the metal contacts is a major obstacle in the development of high-performance crystalline silicon homojunction solar cells. To address this issue, we insert thin intrinsic hydrogenated amorphous silicon [a-Si: H(i)] passivating fil ...

American Institute of Physics2014

Is light-induced degradation of a-Si:H/c-Si interfaces reversible?

Christophe Ballif, Bénédicte Demaurex, Stefaan De Wolf, El Mahdi El Mhamdi, Jakub Holovsky

Thin hydrogenated amorphous silicon (a-Si:H) films deposited on crystalline silicon (c-Si) surfaces are sensitive probes for the bulk electronic properties of a-Si:H. Here, we use such samples during repeated low-temperature annealing and visible-light soa ...

AIP American Institute of Physics2014

Passivating contacts for homojunction solar cells using a-Si:H/c-Si hetero-interfaces

Bénédicte Demaurex

Crystalline silicon (c-Si) homojunction solar cells account for over 90% of the current photovoltaic market. However, further progress of this technology is limited by recombinative losses occurring at their metal-semiconductor contacts. The goal of this t ...

EPFL2014

Amorphous/crystalline silicon interface defects induced by hydrogen plasma treatments

Christophe Ballif, Bénédicte Demaurex, Duncan Thomas Lindsay Alexander, Stefaan De Wolf, Loris Barraud, Jonas Geissbühler, Johannes Peter Seif

Excellent amorphous/crystalline silicon interface passivation is of extreme importance for high-efficiency silicon heterojunction solar cells. This can be obtained by inserting hydrogen-plasma treatments during deposition of the amorphous silicon passivati ...

American Institute of Physics2013

Improved amorphous/crystalline silicon interface passivation by hydrogen plasma treatment

Christophe Ballif, Antoine Descoeudres, Benjamin Strahm, Bénédicte Demaurex, Stefaan De Wolf, Loris Barraud, Jakub Holovsky, Johannes Peter Seif

Silicon heterojunction solar cells have high open-circuit voltages thanks to excellent passivation of the wafer surfaces by thin intrinsic amorphous silicon (a-Si:H) layers deposited by plasma-enhanced chemical vapor deposition. We show a dramatic improvem ...

2011